Hydroxyphenylamino-anthracene and process of making same



v UNITED STATES PATENT OFFICE HYDROXYPHENYLAMINO-ANTHRACENE AND PROCESS OF MAKING SAME Ernst Diir, Basel, Switzerland, assignor to the firm Society of Chemical Inclustrie in Basie, Basel, Switzerland No Drawing. Application January 5, 1938, Serial No. 183,537. In Switzerland August 23,1933

3 Claims. (01. 260571) It has been found that the 4'-hydroxyphenyl- 2. A process for the manufacture of products aminoanthracenes of the general formula of the general formula m can be obtained by heating hydroxyanthracenes of the general formula t0 cm comprising boiling under reflux a product of the general formula OH OH \j 15 in the presence of alkali metal bisulfite solution with 4-amino-1-hydroxybenzene.

The following example illustrates the inventogether with an alkali metal bisulfite and 4- amino-l-hydroxybenezene until the desired tion, the parts being by weight: product is formed 20 10 parts of ,B-hydroxyanthracene, 20 parts of A process for the manufacture of water and 100 parts of sodium bisulfite solution H of 42 per cent. strength are boiled in a reflux 1 O apparatus for about 2 hours. After addition of 7 parts of p-aminophenol boiling is continued for 25 48 hours. The desired product crystallizes from the cold solution in light colored crystals.

This application is a continuation-in-part of my application Serial No. 739,357 filed August 10,1934. 001! comprising boiling under reflux What I claim is: 1. The compound of the formula together withran alkali metal bisulfite and 4- O O G amino-l-hydroxybenzene until the desired prodnot is formed.

.ERNST Dim. 

